2-20. OPERATING FROM DRAFT (Continued).
If a shutdown is required for changing hoses or any other reason, slow the engine to decrease
water pressure to 30 psi and close the discharge valves. Open tank-to-pump valve control
handle (13, figure 2-1) and tank fill control handle (14) to recirculate the water.
Shut down pump by turning engine throttle control knob (3, figure 2-1) clockwise to throttle engine down.
Turn heat exchanger control switch (20, figure 2-1) to the "OFF"position.
Turn pressure relief control knob (12, figure 2-1) clockwise until tight.
Close discharge valves and tank-to-pump valve control handle (13, figure 2-1). Remove and store hard
suction hose and strainer.
Disengage fire pump as described in paragraph 2-17.
2-21. OPERATING FROM FIRE HYDRANT.
To operate from hydrant requires the use of a 2½ inch hose and suitable couplings.
Engage fire pump as described in paragraph 2-15.
Close all drain and valve controls.
Remove cap from desired 3 inch suction inlet. Connect 2½ inch hose with adapter to suction inlet and
Connect 2½ inch hose to discharge outlet (26, figure 2-1) or use the two preconnected hoses located in the
small hose beds.
Using hydrant wrench, open hydrant supply slowly and observe pressure readings on master pressure gauge
(9, figure 2-1) and compound pressure gauge (10).
Check for proper hose lay and nozzle setting.
Turn heat exchanger control switch (20, figure 2-1) to the "ON" position.
Pull open desired discharge valve control(s).